Transmission lines, fundamental structures

An interesting polymeric structure, based on octahedrally coordinated cations corner-linked to each other by shared anions, results from a similar increase of cation size in an initially molecular MX4 liquid. Such structures, and their more cross-linked relatives with still higher coordination numbers consequent on smaller anion-cation radius ratios, are no doubt fundamental to the new class of fluoride glasses based on Zrp4 and Hfp4, which are currently a focus of attention in laser and infrared transmission line technology. ... 

Fig. 3.26. Energies of the fundamental absorption edge Es (open symbols) and the lowest E-point band-to-band transition Eq or Eq (filled symbols) of MgxZni xO, as determined by transmission measurements (T) and SE, respectively. Filled squares Refs. [15,16] (SE), filled circles [95] (T), filled diamonds [90] (SE), filled up-triangles [96] (T), filled down-triangles [82] (SE), open circles [11] (T), open diamonds [97] (T), open up-triangles [14] (T), open down-triangles [98] (T), open left-triangles [99] (T), open right-triangles [100] (T). The lines depict numerical approximations according to (3.31) with the parameters in Table 3.16 for Eq (wurtzite-structure Mg Zni- O) and Eq (rocksalt-structure Mg Zni- O)...

---